// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "ui/gl/gl_image_ref_counted_memory.h"

#include <stddef.h>

#include "base/logging.h"
#include "base/memory/ref_counted_memory.h"
#include "base/trace_event/memory_allocator_dump.h"
#include "base/trace_event/memory_dump_manager.h"
#include "base/trace_event/process_memory_dump.h"
#include "ui/gfx/buffer_format_util.h"

namespace gl {

GLImageRefCountedMemory::GLImageRefCountedMemory(const gfx::Size& size,
    unsigned internalformat)
    : GLImageMemory(size, internalformat)
{
}

GLImageRefCountedMemory::~GLImageRefCountedMemory()
{
    DCHECK(!ref_counted_memory_.get());
}

bool GLImageRefCountedMemory::Initialize(
    base::RefCountedMemory* ref_counted_memory,
    gfx::BufferFormat format)
{
    if (!GLImageMemory::Initialize(
            ref_counted_memory->front(), format,
            gfx::RowSizeForBufferFormat(GetSize().width(), format, 0))) {
        return false;
    }

    DCHECK(!ref_counted_memory_.get());
    ref_counted_memory_ = ref_counted_memory;
    return true;
}

void GLImageRefCountedMemory::Destroy(bool have_context)
{
    GLImageMemory::Destroy(have_context);
    ref_counted_memory_ = nullptr;
}

void GLImageRefCountedMemory::OnMemoryDump(
    base::trace_event::ProcessMemoryDump* pmd,
    uint64_t process_tracing_id,
    const std::string& dump_name)
{
    // Log size 0 if |ref_counted_memory_| has been released.
    size_t size_in_bytes = ref_counted_memory_ ? ref_counted_memory_->size() : 0;

    // Dump under "/private_memory", as the base class may also dump to
    // "/texture_memory".
    base::trace_event::MemoryAllocatorDump* dump = pmd->CreateAllocatorDump(dump_name + "/private_memory");
    dump->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize,
        base::trace_event::MemoryAllocatorDump::kUnitsBytes,
        static_cast<uint64_t>(size_in_bytes));

    pmd->AddSuballocation(dump->guid(),
        base::trace_event::MemoryDumpManager::GetInstance()
            ->system_allocator_pool_name());
}

} // namespace gl
